Fused disconnecting plug



Oct. 17, 1933. E, M MARCHAND 1,930,594

FU SED DI SCONNECTING PLUG Filed Jan. 12, 1931 2 Sl'xeelzS--Shee'cy 1 l www fj Q H/S A TTOQ/VEV Oct. 17, 1933. E, M, MARCHAND 1,930,594

FUSED DISCONNECTING PLUG Filed Jan. 12, 1951 2 Sheets-Sheet 2 Patented Oct. 17, 1933 `FUsEn plvscoNNEomGriQUGff l n EigeneM.Marchand, Bristol, conn., ssigno'r any, Bristol, Conn.,

. necticut' to The yNew Departure Manufacturing Com` a corporation o! Con-yr f 'Apucatignoaimary 12, 1931. serial No. 508,021

' 1s claims.`4 (claw-1155i` This invention relates to fused, disconnecting plugsand comprises allthe featuresbf novelty A herein disclosed. An object ofgtheinvention is to provide an improved disconnecting plug and fuse holder Vwhich is :convenient of access, comlpact and simple in constrlictiom Another 'lobjectis toprovide aefu'se holder which Will effectively guard the fuse and protect theworkman againstelectricalfshock besides being useful as 1.0 a disconnecting plug--whichi will allow the, safe renewal of fuses. To thesexends andto improve. generally uponrdevices of this character, the ina ventionvalso resides lin the various matters hereinafter described and :laimed.'gr-xr 1.5 Inf itsbroader aspectsi'tl'i'e inventionv is notv y necessarily limited:` to :f-the=:fspecic construction `selected rfor'illustrative Aplli'rpro'sesjin the accom-v panying drawings in which'fr y x ,n Fig. 1 isa planview of thegfusedjdisconnecting P1ug..1,; a r

Fig.-2 isaside-.view. s A 1 ..1 Fig. .3 is a section" on line 3--3 o'IfYFig. Y1 kwith parts in ffront'elevation 4 is a sectional view on line 4-4 ofFig. 2.'

.f5.is aetopview of the centralblock..` 1 'Figl 6 is anend view onthecentral'block.. Figxl is across sectionaPiviewbt. the central Fig. 8is an vouter sideviewof an'end block. t '.Figiglis an inner side viewoi' the'endblock. l Fig. 10 is a side elevation-of the endblockL Fig. 11 isa planjview of an end cap;v Fig. 12 is an`inner side view of'theend rig can.` Fig. ;13l is a perspective viewoiI a socketfpiece. 1 Fig. 14 is a perspectiverviewct a spring socket PleCe-Q; fs c auf" I `The fuseholder comprises a centralblock orr body. 2- partly over-lapping gend. blocks. 4 :and 6 which are vclcr sedbyvy end caps 8, al1-f preferably of'moulded bakelite. ,The central blockvis provided throughrthecent'er. with one or more fuse openingsnl2 eaclroiv which tapers or enlargesin opposite directions from the center. n The block is supported in Lsuitable way,A as bya rod 14 iixedtoa bracket 16 .and extending l.through a ,y cross hole `18 inv the block; (and through.another block or fuse holder-20r forsmallercapacity fuses ,it desired) toreceive` a `wing-nut 22.` VThe block 2 also has a supporting lug `24 to enter a holein the bracket, and if ausecond fuseA holder 20 is jdesired, the latter will also have a'supportingv lug 26 4(Fig. 2) `toenter a hole 2'8 in the block 2.` The blockl2 isprovided with a number of brass 55 inserts 60 moulded in diagonally spaced holes in The cut-,out portions 44 of the block and tapped to, receive lthe Ias- Vtoning screws for the end blockvv 4 or 6.

Each end block 4 or 6 hasv an extended por? tion 32 ttingin or telescopingfwith-asimilarly shaped rim or extension 34 of the block v,2. Qne n lside of 4each `end block has one or more hexagonal recesses 36 `ali`gne`d with the `fuse openings-12.

A metal socket piece 38, which is externally Vhexagonal, fits freely in each reoessof the end block 4,;the socket piececomprising. acup .having a A gas relief ppening 37 and an ,axiallyy projecting holdingstud 40 which projects through a'hole A42 intov an irregular recess or Vcut-out part of Athe block :4. The (studs, arefthreaded yto receive 1 securing nuts .'46 andare extendedto form bindingvposvts'forl the terminalsof` electrical load con- Aductors 48 which are fastened by binding nuts .7540.. Each socket piece 38` is internally threaded Vto-screwk onto thewthreadedY endyof, a standard renewable-type ,cartridge fuse 52'from whichthe usual end cap has been: removed, the usual fuse ylinkv abutting against the `bottom .of the socket `piece. The .internal construct-ion," of i the, *other` .lend block 6 is similar to that `oi? `the block ibut ,thehexagonal recesses receive( :spring socket i pieces 54 having spring fingers 4564which yieldingly embrace the adjacent caps of the. fuses 52. The

spring socket pieces 54 arefastened in .there- 1 cesses `by nous 6o kwhich aisofrmbmdmg 'posts' for I other telectrical ,condu' Y torsfthse las@ being thete'rminals oftheline wires; f i u the. endl vblocks .4

and=6 form passagesfor the electrical k'conductors whichY are further separated from oneanother vby `the triangular lug or extension r62 `and `thelarger extension 64. The lugs have countersunk openings 66 to receive theabove mentioned fastening f `bolts which are threaded into the tapped inserts v30.` vSuch bolts are desirably omitted however from the block 4 which carries thesocket pieces ment offuses. Theelectrical conductorsare coveredfby the `recessed end caps; 8 which Vhave Yend blocks. The end blocks yand endcaps-.are

vfurther fastenedrtogether by clamping qbolts V'14, -the blocks `and caps matingv together. at'their I1.05

lower ends and `forming threaded sockets `holding'the usualspiral cables'lawhich encase the` electrical conductors. l -d The central block 2 together withthe end block f 6 and its'ca'p 8 are desirably permanently united :11.10

v $38, thereby to providefor easy andy safe replacey iis to guard the spring socket pieces and the line terminals. To get at the fuses, the other end block 4 and its cap 8, together with the socket pieces 38 and fuses 52, can be pulled away, the fuses slipping out from the spring fingers and through thev tapered openings 12. Fuses are easily and safely replaced in the socketpieces and the renewed structure can be readily reassembled, the tapered openings l2 guiding the fuses back into the central block. The fusesare always well protected and cannotbe touched by theworkman until the whole end structure which carries all the fuses is soifar withdrawn that theA fuses and by the frictional fit of the rim 32 within the rim or extension 34, 'the edges of the rim'32 preferably having the inclined gasfrelier ports shown in Fig. 10. s

Iclaim: W

1. In a device of the character described, an insulating center block having an openingtherethrough, insulating end blocks haaing socket lpieces aligned with theopening, electrical conductors connected to the socket pieces, and a fuse secured to one of the socket pieces and extending Vthrough the opening oi the centerblock to deytachably engage the other socket piece; substanltially as described.v

2. In a devic'e'of the character described,- an insulating center block having an opening therethrough, insulating end blocks having socket Apieces aligned with the opening, electrical conductors connected' to the Vsocket pieces, Aa fuse `secured to one of the socket pieces and extending throughV the openingnof the center bl'ockto detachably engage the other socket piece, and one of the end blocks having a portion telescoping with the center `block and removable therefrom with the fuse; substantially asdescribed.

3. In a device of the character described, an

insulating center block having an opening therethrough, insulating end blocks having*A socket pieces aligned with the opening, means forsecuring the socket pieces to the end blocks, the end blocks having their outer sides recessed, electrical connectors extending through said recesses and connected to the socket pieces, and aV fuse secured to one of the socket pieces and extending through the opening of the center block to detchably engage the other socket piece; sustantially as described.

4. In a device of the character described, an f insulating center block having an'opening there- `through, insulating end blocks'having socket piecesaligned with the opening, electrical conductors connected to the socket pieces, a fuseselcured to one of the socket pieces and extending through the opening of the center block to dep tachably engage the other socket piece, theend blocks being recessed for the conductors, andend caps secured to the end blocks and covering the conductors; substantiallyV as described.

5. In a device of the character described, an

insulating center block having an opening there- Y through, insulating end blocks having .socket pieces aligned with the opening, electrical conblock;l substantially as described.

ductors connected to the socket pieces, a fuse secured to one of the socket pieces and extending through the opening of the center block to detachably engage the other socket piece, the end blocks being recessed for the conductors, end caps secured to the end blocks and covering the conductors, and the end blocks` and end caps having mating portions forming sockets for cable encasing the conductors; substantially as described.

y 6. In a device of the character described, an insulating block having a fuse opening, a fuse in the opening, a socket piece yieldably engaging one end of the fuse andl having connection to electrical conductors, a socket piece secured to the other end of the fuse, an insulating end block having a recessV for said last socket piece, means for securing'th'e socket piece to the end block, and the end ;blockhaving an overlapping and detachable engagement with the other block; substantially as described.

"1. In a .device ofthe character described, in

combination, astandard cartridge fuse', a spring socket piece. to engage `one end of the i'use, a

Asocket piece replacingthe usual cap at the other end of `the fuse and comprising an internally threaded cup screwed on the fuse and having an axiallyprojecting threaded stud, an insulating end block having a recess receiving the threaded cup and a communicating opening for the threaded stud, an electrical conductor, and means on the stud for securing the cup in the recess and for securing the conductor to the stud; substantially as described."

Q 8. In .a device of 'the character described, ani

'in each end block to engage an end of the fuseY cne oi' the socket pieces having spring ngers and the other comprising an internally threaded cup,

`and the socket pieces tting interchangeably in sockets of the end blocks; substantially as described;

9. Ina device insulating center block-and insulating end blocks,

la fuse extending through-the center block from vone end block to the other, a socket piece in each endblock to engage an end of the fuse, one oi the socket pieces having spring lingers and the other comprising yan internally threaded cup, the socket pieces ntting interchangeably in sockets of the end blocks, and the end blocks being interchangeable and having portions overlapping the 10. In a device of the character described, an insulating center block having a plurality of tapered openings therethrough, insulating end blocks interiitting with the ends oi the center block, the end blocks having Vrecesses on their inner sidesl aligning with saidA openings, socket pieces in said recesses and having studs projecting through the end blocks into recesses in the outer sides of the end blocks, electrical conductors or the character described, airl isc v v l Y 1,930,594, `next block, and a supporting rod vfor the blocks; Y substantially as described.

12. In a device of the ycharacterdescribed, an insulating body having a plurality of fuse openings, a. fuse in each opening; an insulating end block at the end of the body and having internal recesses aligned withv the fuse openings, socket pieces in the recesses and having'studs projecting through the end block, the outer vside of the end block also having a recess leading laterally vto saidstuds, electricalconductorsin said recess and secured to rthe studs, and insulating projections in the recess to separate the conductors;A substantially as described.

13. In a deviceofgthe character described, an insulating body having a plurality .of fuse openings,` a fuse in each opening, an insulating end block at the end of the body, socket pieces aligned with the openings and-engaging the fuses, the socket pieces having studs projectingthrough the end block, the outer lside of the end` block vhaving a recess leading laterally to said studs,

electrical conductors in'said recess and secured to the studs, and insulating projectionsin the recessandseparating the endsof the conductors; substantially as described. f

14. In a device of the character described, van insulating body having a fuse opening, a fuse in the opening, an insulating end block having a socket piece aligned with `the opening and engaging thev fuse, a stud projecting from `the socket piece through the end block, the outer side of the end block having a recess leading laterally to said` projecting studf'and anelectricalconductor in said recess and secured to'thefstud; substantially a as described.

15. In a device of the character described, an insulating body having afuse opening, a fuse in the opening, 4an insulating end block having a socket piece aligned with theV opening and enand the end `cap and, end vblock having mating ga'ging the fuse, a` stud projecting from the socket piece through the end block, the outerv side o! the end blockv having a recessL leading laterally to Ysaid projectingstud, an electrical 1 conductor in u rsaid recess and secured to the stud, and an insulating cap covering said stud and the conductor;

substantially as. described. y

16. .In a device of the character described, an insulating body having a fuse openinga fuse in the opening, an insulating end block ,at vthe end of Athe body and having an internal recess' aligned with the fuse opening, a socket piece in the recess and engaging the fuse,l the socket piece also hav- `ing a stud projecting through the end block into an external recess thereof, and an electrical conductor in the recess and secured to the stud;

vsubstantially as described.

l'l. In a device of the character described, an insulatingfbody having a fuse opening, a fuse in the opening, an insulating end block at the end of the body and having an internal recess aligned with the 'fuse opening, a socket piece in the recess.V

` and engaging the fuse, the-socketpiece also hava ing a stud projecting through the end block into an external recess thereof, an electrical conductor in the recess and secured to the stud, and l an insulating cap covering the conductor and the i stud; substantially as described.V`

g 18. In a device ,of the character described an insulating body" having a fuse opening, a fuse in the opening, an end block having a socket piece aligned with theopening and engaging the fuse, an electrical conductor connected to the socket piece,A the end block being externally recessed for the conductor, an end cap coveringthe recess,

portions forming a screw socket for a cableencasing Athe conductor; substantially as described.

EUGENE M. MARCHAND. 

